Category: Orchid Doctor

LEAVES: Wrinkling on Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago This is caused either by overwatering or under-watering, so take your pick; disease is not likely to cause it; also, check the roots. A81-969 Read More

LEAVES: Yellowing

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Usually caused by too high light levels and indicates the lighting should be reduced by 25 to 50%; also, increase the Mg and Fe in the fertilizer. Au84-204Young leaves on new cymbidium shoots turne... Read More

LEAVES: Yellowing of Premature Growth

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Can be caused by improper feeding, or drying, or low temperature, or poor aeration in the pot. A79-910 Read More

LEIS, HAWAIIAN: Their Origin, History and Styles

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Vandas are the most popular flower especially V. Miss Joaquim which remains fresh for four or five days; illus. of garland style, Maunoloa, Maunakea, regular round, feather and snake. F70-60+ Read More

LIGHT METERS: Measurement

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago The Light Intensity Meter it is claimed reads both sunlight and artificial light; advt. A84-1083 Read More

LIGHT, NATURAL: And Epiphytes

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Requirements for optimum growth for high light and low light plants; theoretical; refer to A85-819 Read More

LIGHT, NATURAL: Characteristics

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago And the reaction of different genera of plants to it outdoors and inside the greenhouse: vandas, cattleyas, phalaenopsis; on leaf burn; refer to AH86-97It consists of four P's: photosynthesis, in w... Read More

LIGHT, NATURAL: Checking with a Light Meter

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago After obtaining a reading, move the plants closer to or farther away from the source depending on requirements; at 1000fc, over 12 hours the exposure is 12,000fc.-hours per day; on a clear day in F... Read More

LIGHT, NATURAL: For Cattleyas

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Young cattleyas can stand more light than mature plants, not less; no reason to shade them, except to watch the moisture content of small plants. A68-911 Read More

ACID OR ALKALINE: Changing the Values

Author is Robert M. [Bert] Hamilton (Compiler), posted almost 8 years ago Various means can be used: tufa, a limestone form, can be added to paphiopedilums from limestone cliffs; bark composts acidify with age; peatmoss, pine needles, oak leaves in the mix produce acidit... Read More